All categories

3 years ago

A cannonball is launched at ground level at an angle of 30° above the horizontal with

Physics

2 answers:

user100 [1]3 years ago

8 0

Answer:

use the kinematics equations and solve for time, after that use dleta dx=Vi*delta time

Nookie1986 [14]3 years ago

8 0

Use the kemetic equation

You might be interested in

There are 100 cm in every meter. If a measurement is 1.67 m, what is the measurement expressed in centimeters?

timofeeve [1]

100 cm is in every meter means that the conversion from meter to centimeters is multiplying by 100. So you would multiply 1.67 by 100, which is 167cm.

8 0

3 years ago

A dog uses 300 N of force to run 50 m with a speed of 5.9 m/s. How much power does he expand

balu736 [363]

Answer:

1.47kW

Explanation:

F = 300N, s = 50m, v = 5.9m/s

P = W/t

= (F× )/t

= F × v

= 300 × 5.9

= 1470Watt

= 1.47kW

6 0

4 years ago

Read 2 more answers

A good soccer player can kick the ball up to 25 m/sec. A soccer ball has a mass of 800 grams (0.8 kg). What force must a goalie

Oksana_A [137]

Answer:

200 N

Explanation:

Applying,

The force a golie must exert on the ball is,

F = ma...................... Equation 1

Where m = mass of the ball, a = acceleration of the ball.

But,

a = Δv/t............... Equation 2

Where Δv = change in velocity, t = time.

Substitute equation 2 into equation 1

F = m(Δv/t)............... Equation 3

From the question,

Given: m = 0.8 g, t = 0.1 s, Δv = 25 m/s

Substitute these values into equation 3

F = 0.8×25/0.1

F = 200 N

6 0

3 years ago

A highway patrolman traveling at the speed limit is passed by a car going 20 mph faster than the speed limit. After one minute,

Oksi-84 [34.3K]

Answer:

It will take 40 seconds to catch the speeding car

Explanation:

Initial speed of the patrolman = 55 mph

after one minute speed of patrol man = 115 mph

now acceleration of patrolman is given by

$a = \frac{v_f - v_i}{t}$

$a = \frac{115 - 55}{1/60} = 3600 m/h^2$

now at this acceleration the distance covered by patrolman in "t" time is given as

$d = v_i t + \frac{1}{2}at^2$

$d = 55t + 1800t^2$

now we know the speed of the speeding car is given as

$v' = (55+20) mph$

now in the same time distance covered by it

$d = 75 t$

now since the distance covered is same

$75 t = 55t + 1800 t^2$

$t = \frac{20}{1800} = \frac{1}{90} h$

$t = 40 seconds$

7 0

4 years ago

Read 2 more answers

Calculate specific heat of liquid if a 450. g iron block is heated to 98.0 C and then droped into a calorimeter with 125 g of un

Naya [18.7K]

Answer:

Specific heat of liquid $1.258 \ J/g^0C.$

Explanation:

We know in thermal equilibrium :

Loss in heat by iron block = Gain in heat by liquid .

Specific heat of iron = 0.45 $J/g^0C.$ { source internet }

Now , loss in heat by iron block = $mC_{iron}\Delta T=450\times 0.45\times 57.6=11664\ J.$

Heat gain by liquid= $mC_{liquid}\Delta T=450\times C_{liquid}\times 20.6=9270\times C_{liquid}.$

Equating both we get :

$C_{liquid}=1.258 \ J/g^0C.$

7 0

3 years ago